If you’re like me, you appreciated the opportunity in spring training to was the Automatic Ball-Strike System (ABS) in action. It was an initiative Major League Baseball, always on a quest to improve the game, brought to MLB in giving the system a test drive.
In case you’re interested in specifics, Anthony Castrovince explained back in February,
In the ABS challenge system, the human, home-plate umpire calls balls and strikes, per usual. But Hawk-Eye technology is running in the background, monitoring the exact location of the pitch relative to the batter’s strike zone. This allows players to ask for a challenge of a ball or strike call that they feel the umpire got wrong.